Re: [Xen-users] Question about vnc

[virtual@xxxxxxxxxxxxx]

Thanks for your response. I tryed config

usbdevice='tablet' , but , I saw same problem,

details follows your response.

>> I'm using Windows HVM on CentOS 5.1, xen 3.1. When I conect VNC to
Dom0 IP 

>> , I get correct screen, main windows console. 

>> 

>> But I have a very very poor mouse performance. 

>> 

>> I tried xensoure 4.1 , and I saw a mouse performance a little bit
better 

>> than xen 3.1 w / CentOS 5.1. 

>> 

>> What is me problem, CentOS 5.1 or xen 3.1 , or compilation wrong maked
by 

>> CentOS people. Why xensource vnc performance is better than xen 3.1 ?


> 

> In what way is the performance improved? 

Performance problem is .. real pointer never was in same place that virtual
pointer .. I move mouse but , pointer on virtual screen do not follow it , with
same velocity and never arrives on same place.

my config file 

=================================================================

import os, re

arch = os.uname()[4]

if re.search('64', arch):

    arch_libdir = 'lib64'

else:

    arch_libdir = 'lib'

kernel = "/usr/lib/xen/boot/hvmloader"

builder='hvm'

memory = 1024

shadow_memory = 16

name = "web04"

vcpus=2

pae=1

acpi=1

apic=1

vif = [ 'type=ioemu, bridge=br0' ]

disk = [ 'phy:/dev/vms_6/web04,hda,w' ]

#on_poweroff = 'destroy'

#on_reboot   = 'restart'

#on_crash    = 'restart'

device_model = '/usr/' + arch_libdir + '/xen/bin/qemu-dm'

boot="c"

sdl=0

vnc=1

stdvga=0

usbdevice='tablet'

=====================================================



> 

> One optimisation that is worth doing on Open Source Xen is to make sure you


> have enabled usbdevice='tablet' in the domain's configuration file. 

> 

> This makes the guest use an emulated graphics tablet as the pointing
device. 

> This provides much better tracking of the mouse pointer and makes it
possible 

> to use "grabless" operation: the guest pointer follows your mouse
to the edge 

> of the guest window. When you bright the mouse back into the guest window,


> the pointer immediately jumps to the right place. 

> 

> It could be that CentOS Xen hasn't automatically set this option, where 

> XenEnterprise has. 

> 

> Cheers, 

> mark 

> 

> -- 

> Dave: Just a question. What use is a unicyle with no seat? And no pedals!


> Mark: To answer a question with a question: What use is a skateboard? 

> Dave: Skateboards have wheels. 

> Mark: My wheel has a wheel! 

> 





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